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Business Acquisitions - Intangible Assets Acquired in Acquisition (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 15, 2013
Dec. 29, 2012
Jun. 15, 2013
Trade Names and Trademarks [Member]
Jun. 15, 2013
Customer List Assets [Member]
Jun. 15, 2013
Customer List Assets [Member]
Minimum [Member]
Jun. 15, 2013
Customer List Assets [Member]
Maximum [Member]
Jun. 15, 2013
Licensing Arrangements [Member]
Jun. 15, 2013
Licensing Arrangements [Member]
Minimum [Member]
Jun. 15, 2013
Licensing Arrangements [Member]
Maximum [Member]
Jun. 15, 2013
Developed Product Technology [Member]
Jun. 15, 2013
Developed Product Technology [Member]
Minimum [Member]
Jun. 15, 2013
Developed Product Technology [Member]
Maximum [Member]
Jun. 15, 2013
Backlog [Member]
Jun. 15, 2013
Net Favorable Leases [Member]
Business Acquisition [Line Items]                            
Intangible assets acquired $ 820.6 $ 820.6 $ 661.8 $ 110.5     $ 28.1     $ 14.5     $ 5.1 $ 0.6
Intangible assets, useful life     Indefinite                      
Intangible assets, useful life         3 years 20 years   4 years 5 years   3 years 5 years 6 months 10 years